I thought my peak was yesterday. My opk test line was as dark as the control but today its unquestionable that it's my actual peak. I'm posting bc the premium app had said it was my peak yesterday and that O would be today, but now that I've had the even higher peak it has changed to say today is my peak and O is tomorrow. I had always stopped testing when I got a peak reading similar to what I did yesterday and I believe that I could have possibly been off on what I thought my O day was, and generally the advice is once you peak stop testing but I'm so glad I tested again or I could have assumed my fertile window was shorter than I thought and timed BDing according to that info. Just wanted to post in case this is helpful to anyone else, it came as a big surprise to me. I've been tracking and TTC for over a year and thought I was SURE I was doing it correctly but I'm obviously learning new things about my body every day! Baby dust to all you momma's and future momma's 💙